Drive to the drag strip/ TX Mile, this car will make more power than the graph you posted (if its yours) and it will do it with less boost. And It will roll up 99% of cars on the freeway. Why dont you go over to the supra forums and preach about their narrow tq curves and useless peaky hp?
And I dont recall any auto manufacture EVER oversizing turbos and making them laggy/peaky. They are nearly always heavily undersized.
I will state specifically that this car is obviously not going to get around a road course in any hurry. In all other aspects of speed and road worthiness it is as up to par as yours is.